Free PMI Project Management Professional (PMP) Practice Question

The correct answer is 15 days. In PERT, the expected duration (TE) is calculated using the formula:

TE = (Optimistic + 4 x Most Likely + Pessimistic) / 6

Substituting the given values: TE = (10 + 4 x 14 + 24) / 6 TE = (10 + 56 + 24) / 6 TE = 90 / 6 TE = 15 days

This formula gives more weight to the most likely estimate, as it is considered the best guess based on normal conditions. The optimistic and pessimistic estimates account for best-case and worst-case scenarios, respectively. By using this weighted average, PERT provides a more realistic estimate that considers uncertainty in project activities.